<template>
  <!-- 商品分类导航 -->
  <div class="type-nav">
    <div class="container">
      <div @mouseleave="moveOutDiv" @mouseenter="isShow=true">
        <h2 class="all" >全部商品分类</h2>
        <transition name="sort">
          <div class="sort" v-show="isShow">
            <div class="all-sort-list2" @click="toSearch">
              <div class="item" :class="{item_on:currentIndex===index}" @mouseenter="moveInItem(index)" v-for="(c1,index) in categoryList" :key="c1.categoryId">
                <h3>
                  <a href="javascript:;" :data-categoryName="c1.categoryName" :data-category1Id="c1.categoryId">{{c1.categoryName}}</a>
                </h3>
                <div class="item-list clearfix">
                  <div class="subitem">
                    <dl class="fore" v-for="(c2) in c1.categoryChild" :key="c2.categoryId">
                      <dt>
                        <a href="javascript:;" :data-categoryName="c2.categoryName" :data-category2Id="c2.categoryId">{{c2.categoryName}}</a>
                      </dt>
                      <dd>
                        <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                          <a href="javascript:;" :data-categoryName="c3.categoryName" :data-category3Id="c3.categoryId">{{c3.categoryName}}</a>
                        </em>
                      </dd>
                    </dl>
                  </div>
                </div>
              </div>

            </div>
          </div>
        </transition>
      </div>
      <nav class="nav">
        <a href="###">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>
    </div>
  </div>

</template>

<script>
import {mapState} from "vuex";
import throttle from 'lodash/throttle'
export default {
  name: "TypeNav",
  data() {
    return {
      currentIndex:-1,
      isShow:true
    }
  },
  mounted() {
    //home页有分类,
    if(this.$route.path==="/home" || this.$route.path==="/"){
      this.isShow=true
      //console.log("route1"+this.$route.path+'true')
    }else{
      this.isShow=false
      //console.log("route1"+this.$route.path+'false')
    }

   // this.getCategoryList()
  },
  methods:{
    // getCategoryList(){
    //   this.$store.dispatch('getCategoryList')
    // },
    //节流函数
    moveInItem:throttle(function (index){
      //console.log("测试"+index)
      this.currentIndex=index
    },20,{trailing:false}),
    //点击三级分类,跳转到search页面 携带的参数不一样
    toSearch(event){
      let target=event.target//获取目标元素
      let dataset=target.dataset
      // 如果自定义属性是以data-开头的属性及属性值都会收集到dataset这个容器里 注意不管是大小写全部为小写在这里面的属性
     // console.log("dataset",dataset)
      let {categoryname,category1id,category2id,category3id}=dataset
      if (categoryname){
        //categoryname说明是a标签
        let location={
          name:'search'
        }
        let query={
          categoryName:categoryname
        }
        if (category1id){
          query.category1Id=category1id
        }else if(category2id){
          query.category2Id=category2id
        }else {
          query.category3Id=category3id
        }
        //判断有没有params参数 如果有 就合并起来
        if (this.$route.params){
          location.params=this.$route.params
        }
        location.query=query
        //this.$store.dispatch('getSearchListInfo',location)
      //  this.$router.push(location)
        //如果是home页跳转到search页 用replace
        if (this.$router.path==='/home'){
          this.$router.replace(location)
        }else {
          this.$router.push(location)
        }
      }
    },
    //鼠标移出分类消失
    moveOutDiv(){
      this.currentIndex=-1
      if (this.$route.path==='/search'){
        this.isShow=false
      }
      if (this.$route.path==='/detail'){
        this.isShow=false
      }
    }
  },
  computed:{
    //mapState写数组的两个条件 1.不能用模块化,2.名字必须和vuex中的名字相同 所以这里只能写对象了
  ...mapState({
    categoryList: state=>state.home.categoryList
  })
  }
}
</script>

<style lang="less" scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;

.container {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  position: relative;

.all {
  width: 210px;
  height: 45px;
  background-color: #e1251b;
  line-height: 45px;
  text-align: center;
  color: #fff;
  font-size: 14px;
  font-weight: bold;
}

.nav {
a {
  height: 45px;
  margin: 0 22px;
  line-height: 45px;
  font-size: 16px;
  color: #333;
}
}

.sort {
  position: absolute;
  left: 0;
  top: 45px;
  width: 210px;
  height: 461px;
  position: absolute;
  background: #fafafa;
  z-index: 999;
  &.sort-enter{
    opacity: 0;
    height: 0;
  }
  &.sort-enter-active{
    transition: all .5s;
  }
  &.sort-enter-to{
    opacity: 1;
    height: 461px;
  }
.all-sort-list2 {
.item {
h3 {
  line-height: 30px;
  font-size: 14px;
  font-weight: 400;
  overflow: hidden;
  padding: 0 20px;
  margin: 0;

a {
  color: #333;
}
}

.item-list {
  display: none;
  position: absolute;
  width: 734px;
  min-height: 460px;
  background: #f7f7f7;
  left: 210px;
  border: 1px solid #ddd;
  top: 0;
  z-index: 9999 !important;

.subitem {
  float: left;
  width: 650px;
  padding: 0 4px 0 8px;

dl {
  border-top: 1px solid #eee;
  padding: 6px 0;
  overflow: hidden;
  zoom: 1;

&.fore {
   border-top: 0;
 }

dt {
  float: left;
  width: 54px;
  line-height: 22px;
  text-align: right;
  padding: 3px 6px 0 0;
  font-weight: 700;
}

dd {
  float: left;
  width: 615px;
  padding: 3px 0 0;
  overflow: hidden;

em {
  float: left;
  height: 14px;
  line-height: 14px;
  padding: 0 8px;
  margin-top: 5px;
  border-left: 1px solid #ccc;
}
}
}
}
}

&.item_on {
  background: #bbbbbb;
.item-list {
  display: block;
}
}
}
}
}
}
}
</style>